Improvement in cement and asphaltum pipes



M. ALLEN. Cement and Asphaltum Pip-e.

Patented May 21, 18781..

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MFETERS, PHOTO-LITHOGRAPHER, WASHINGTON. D C.

UNITED STATES PATENT OEEIoE.

MICHAEL ALLEN, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF HIS RIGHT TOTHADDEUS H. WALSH, OF SAME PLACE.

lMPROVE-MENT IN CEMENT ANDASPHALTUM PIPES.

Speciication forming part of Letters Patent No. $203,869,` dated May 2l,1878 application led May 1, 1878.

To all whom it may concern:

Be it known that I, MICHAEL ALLEN, of New York, in the county of NewYork and State of New York, have invented certain new and usefulImprovements in Cement and Asphaltum Pipes; and I do herebydeclarethat-the following is a full, clear, and exact description thereof,which will enable others skilled in the art to which it appertains tomake and use the same, reference being hadto 'the accompanying drawings,and to letters of reference marked thereon, which form a part of thisspecification.

Figure 1 is a longitudinal view with a section, taken on line z 2 ofFig. 2, removed. Fig. 2 is a transverse section. Fig. 3 is a viewshowing the perforations in the sheet metal, and Fig. 4 is a transversesection through the pipe and tap.

The nature of my invention consists in forming a cylinder of asphaltumor cement, in which is embedded one end of a sheet of iron or othermetal, which is then wound around the cylinder and then upon itself, alayer of asphaltum or other suitable cement being interposed between thelayers of metal, the layers of metal and cement, in cross-section,presenting a volute. Any desired number of layers of metal and asphaltumor cement may be made, as experience or the necessities of the case mayrequire, and the whole covered with a layer "of asphaltum or cement. Theobject is to produce a pipe for watermains and other like uses thatshall possess the requisite amount of strength and resistance to thedestroying effects of water through a long series of years.

Pipes made of asphaltum and layers of wood have been used; but those inuse have been found very objectionable for various reasons, among whichappear when an opening is made to tap a water-main the wood is exposedto the action of water, and cannot be effectually covered. The wood,being well seasoned, quickly absorbs the water, swells and breaks thelayers and covering, and destroys the pipe. A like difficulty must beguarded against in forming the ends of the pipes.

Pipes made of layers of asphaltum or cement and cloth have also beenattempted; but

it has been found impossible to get the cloth of sufficient evenness toprevent the stretching of the pipe and breaking of the layers andcovering. A

Pipes formed of layers of wood, cement, and cloth have been used; butthe aggregate ofthe above difliculties attends the use of bothmaterials.

In the drawing, A represents a suitable asphaltum or cement cylinder,formed in any desired manner, and in sections of the required length.

A suitable ring, B, constructed on the inner side with a groove orrecess, C, also with a flange, D, is arranged at one end of the cylinderA, and a like ring, E, constructed with a suitable tongue, F, and aflange, G, arranged at the other.

In the outer surface of the cylinder A is embedded onelend of a sheet ofiron or other metal, H, which is then wound around the cylinder A andflanges D and G, and then upon itself, a layer of asphaltum or othercement being interposed between each two layers as the sheet of metal iswound around, the layers of metal and cement, in a cross-section,presenting a volute, as shown in Fig. 2 of drawing.

Upon the sheet metal, aftermakin g any desired number of layers thereof,is formed an outer layer or cylinder, I, of asphaltum or cement. Y

The sheet metal, before being wound around the cylinder A, is providedwith perforations made with a round conical punch, the burr J beingthrown outward, as shown in Fig. 3 of drawing. The object of these burrsis to make an embedded fastening in the interposed layer of asphaltum orcement, and thus prevent the slipping and expansion of the metal whenthe pipe is submitted to a heavy pressure.

Any desired section of pipe,-or each of them, if desired, may beprovided with a tap, K, constructed with a solid bottom or disk, L,whichis placed inside the cylinder and embedded in it, and is provided with ascrew-threaded tube, a, passing through the pipe, and having the nut Mdriven down upon the metal, so as to make a iirm clamp. This nut is thenembedded in asphaltum.

When the tap is needed for use the solid bottom can be drilled outthrough the tube a, and an attachment made to the screw-threaded tube.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. In cement or other pipe, embedded coils of sheet metal wound around acylinder and then upon itself, having intervening layers of cement orasphaltum, as set forth.

2. A pipe having an inner cylinder, A, between which and an outercylinder, I, are arranged coils of sheet metal H, provided with burrs J,a layer of asphaltum or cement being interposed between each two coilsof metal, as

set forth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

MICHAEL ALLEN.

Witnesses: v

H. B. BROWN, ALBIN M. LONG.

